Kia Sportage: Fuel Delivery System / Fuel pressure test (low pressure system)
| Fuel Pressure Test (Low
pressure system) |
| 1. |
Release the residual pressure in fuel line.
(Refer to the Fuel Delivery System - Inspection - "Release Residual
Pressure in Fuel Line").
|
When removing the fuel pump fuse, a Diagnostic Trouble Code
(DTC) may occur. Delete the code with the KDS/GDS after completion
of “Release Residual Pressure in Fuel Line” work.
|
|
| 2. |
Install the Special Service Tool (SST).
| (1) |
Disconnect the fuel feed tube from the delivery pipe.
|
There may be some residual pressure even after “Release
Residual Pressure in Fuel Line” work, so cover the hose
connection with a shop towel to prevent residual fuel
from spilling out before disconnecting any fuel connection.
|
|
| (2) |
Install the special service tool for measuring the fuel pressure
in between the fuel feed tube and the fuel delivery pipe (Refer
to the figure below).
|
|
| 3. |
Inspect fuel leakage on connections among the low fuel feed tube, the
low pressure inlet of high pressure fuel pump, and the SST components
with IG ON.
|
| 4. |
Measure Fuel Pressure.
| (1) |
Start the engine and measure the fuel pressure at idle.
|
Fuel Pressure: Over 290 kPa (Over 2.9 bar, Over 2.95
kgf/cm², Over 42.06 psi)
|
|
If the fuel pressure differs from the standard value,
repair or replace the related part (Refer to the table
below).
|
Fuel
Pressure
|
Cause
|
Related Part
|
Too Low
|
Fuel filter clogged
|
Fuel Filter
|
Fuel leakage
|
Fuel Pressure Regulator
|
Too High
|
Fuel pressure regulator stuck
|
Fuel Pressure Regulator
|
|
| (2) |
Stop the engine, and then check for the change in the fuel pressure
gauge reading.
|
Standard Value: The gauge reading should hold for about
5 minutes after the engine stops
|
|
If the gauge reading should not be held, repair or replace
the related part (Refer to the table below).
|
Fuel Pressure
(After Engine Stops)
|
Cause
|
Related
Part
|
Fuel Pressure Drops Slowly
|
Leakage on injector
|
Injector
|
Fuel Pressure Drops Immediately
|
Check valve of fuel pump stuck open
|
Fuel Pump
|
|
| (3) |
Turn the ignition switch OFF.
|
|
| 5. |
Release the residual pressure in fuel line.
(Refer to the Fuel Delivery System - Repair Procedures - "Release Residual
Pressure in Fuel Line").
|
When removing the fuel pump fuse, a Diagnostic Trouble Code
(DTC) may occur. Delete the code with the KDS/GDS after completion
of “Release Residual Pressure in Fuel Line” work.
|
|
| 6. |
Test End
| (1) |
Remove the Special Service Tool (SST) from the low pressure
fuel feed tube and the low pressure inlet of high pressure fuel
pump.
|
| (2) |
Connect the low pressure fuel feed tube and the low pressure
inlet of high pressure fuel pump.
|
|
Components Location
1. Fuel tank
2. Fuel pump
3. Fuel filter
4. Fuel pressure regulator
5. Canister
6. Fuel tank air filter
7. Fuel perssure sensor ...
Release Residual Pressure
in Fuel Line
Whenever the high pressure fuel fuse, fuel pipe, delivery pipe, or in ...
Other information:
Description
The fuel pump control module (FPCM) is installed on the right side of the fuel
tank and controls the DC motor mounted inside the low pressure fuel pump.The
module compares instantaneous fuel pressure information measured by the fuel
pressure sensor (FPS) with tar ...
Disassembly
In case of removing the high pressure fuel pump, high pressure fuel
pipe, delivery pipe, and injector, there may be injury caused by leakage
of the high pressure fuel. So don’t do any repa ...
Components and components location
Release residual pressure in fuel line